Backlight unit and display apparatus including the same

Abstract

A display apparatus includes a display panel; a light source unit including a plurality of first point light sources and a plurality of second point light sources, wherein the point light sources supply light to the display panel; an optical film including a plurality of openings, wherein each opening exposes a first point light source, and is provided between the display panel and the light source unit at a distance from the light source unit; and a light source driver which supplies a driving power to the first point light sources if a three-dimensional image is displayed on the display panel, and supplies the driving power to the second point light sources if a two-dimensional image is displayed on the display panel.

1 . A display apparatus comprising:
 a display panel;   a light source unit comprising a plurality of first point light sources and a plurality of second point light sources, wherein the point light sources supply light to the display panel;   an optical film comprising a plurality of openings, wherein each opening exposes a first point light source, and is provided between the display panel and the light source unit at a distance from the light source unit; and   a light source driver which supplies a driving power to the first point light sources if a three-dimensional image is displayed on the display panel, and supplies the driving power to the second point light sources if a two-dimensional image is displayed on the display panel.   
     
     
         2 . The display apparatus of  claim 1 , wherein a diameter of each opening is greater than a multiplication product of an emergence angle of an incident light from a point light source and the distance. 
     
     
         3 . The display apparatus of  claim 1 , wherein the light source unit further comprises a point light source substrate on which the first point light sources and the second point light sources are arranged, and the first point light sources and the second point light sources are uniformly arranged on the point light source substrate. 
     
     
         4 . The display apparatus of  claim 3 , wherein the light source unit further comprises a plurality of first point light source columns in which the first point light sources are arranged, and a plurality of second point light source columns in which the second point light sources are arranged, and the first point light source columns and the second point light source columns are alternately arranged. 
     
     
         5 . The display apparatus of  claim 4 , wherein first point light sources of a first point light source column are misaligned with neighboring second point light sources of a second point light source column. 
     
     
         6 . The display apparatus of  claim 1 , wherein the light source unit is divided into a plurality of light source areas comprising the first point light sources and the second point light sources, and the light source driver supplies the driving power source based on the light source areas. 
     
     
         7 . The display apparatus of  claim 1 , wherein the optical film comprises an antireflection coating layer formed on a surface facing the display panel. 
     
     
         8 . The display apparatus of  claim 1 , further comprising a non-scattering layer formed between the optical film and the light source unit. 
     
     
         9 . The display apparatus of  claim 1 , wherein the display panel comprises a liquid crystal panel. 
     
     
         10 . The display apparatus of  claim 1 , wherein the point light sources comprise a light emitting diode or a laser diode. 
     
     
         11 . A backlight unit comprising:
 a light source unit comprising a plurality of point light sources and a point light source substrate on which the point light sources are mounted; and   a diffusion film comprising a plurality of openings, each of which exposes a part of a point light source, and is separated from the point light source by a distance.   
     
     
         12 . The backlight unit of  claim 11 , wherein a diameter of each opening is greater than a multiplication product of an emergence angle of an incident light from the point light source and the distance. 
     
     
         13 . The backlight unit of  claim 11 , wherein the light source unit comprises:
 a plurality of first point light sources, each corresponding to an opening; and   a plurality of second point light sources covered by the diffusion film;   wherein the first point light sources and the second point light sources are uniformly arranged on the point light source substrate.   
     
     
         14 . The backlight unit of  claim 11 , wherein the diffusion film comprises an antireflection coating layer formed on a surface that does not face the point light source. 
     
     
         15 . The backlight unit of  claim 11 , further comprising a non-scattering layer formed between the diffusion film and the light source unit.